- With Mayo Clinic physical medicine and rehabilitation specialist
Edward R. Laskowski, M.D.
read biographyclose windowBiography of
Edward R. Laskowski, M.D.
Edward R. Laskowski, M.D.
Dr. Edward Laskowski is certified by the American Board of Physical Medicine and Rehabilitation, including subspecialty certification in sports medicine, and is a fellow of the American College of Sports Medicine. He is co-director of the Mayo Clinic Sports Medicine Center and a professor at College of Medicine, Mayo Clinic.
He has been on the staff of Mayo Clinic since 1990 and specializes in sports medicine, fitness, strength training and stability training. He works with a multidisciplinary team of physical medicine, rehabilitation and orthopedic specialists, physical therapists, and sports psychologists.
Dr. Laskowski is an elite-level skier and an avid hiker, cyclist and climber. He approaches sports medicine from the perspective of a physician and an athlete.
In 2006, President George W. Bush appointed Dr. Laskowski to the President's Council on Physical Fitness and Sports, and he has received a Distinguished Service Award from the Department of Health and Human Services for his contribution to the Council.
Dr. Laskowski was a member of the medical staff of the Olympic Polyclinic at the 2002 Winter Olympics in Salt Lake City and has provided medical coverage for the Chicago Marathon. He serves as a consulting physician to the National Hockey League Players' Association and is a featured lecturer at the American College of Sports Medicine's Team Physician Course.
Dr. Laskowski, a Cary, Ill., native, has contributed to Mayo Clinic's CD-ROM on sports, health and fitness, a website guide to self-care, and hundreds of Mayo Clinic articles and booklets in print and online. He is a contributing editor to the "Mayo Clinic Fitness for EveryBody" book, and he has presented lectures throughout the world on health, fitness and sports medicine topics. His teaching expertise has been recognized by his election to the Teacher of the Year Hall of Fame at Mayo Clinic.
"There are many myths and misconceptions about exercise and fitness in general, and also many traditions that don't stand up to scientific scrutiny," he says. "My goal is to provide the most up-to-date and accurate information on sports medicine and fitness topics in a way that you can practically incorporate into your life."
Fitness basics (5)
- Body fat analyzers: How accurate are they?
- Heart rate: What's normal?
- Do toning shoes really work?
- see all in Fitness basics
Aerobic exercise (11)
- Barefoot running shoes: Better than traditional running shoes?
- Weighted hula hoops: Hoopla or good exercise?
- Elliptical machines: Better than treadmills?
- see all in Aerobic exercise
Strength training (9)
- Isometric exercises: Good for strength training?
- Weight training: Free weights vs. machine weights
- Weightlifting belt: Do I need one?
- see all in Strength training
Sports nutrition (2)
- 'Natural' steroids: Are they safe?
- Energy drinks: Do they really boost energy?
About our e-newsletters
- Free e-newsletters
- Mayo Clinic expertise
- We do not share your e-mail address
Housecall, our weekly general-interest e-newsletter, keeps you up to date on a wide variety of health topics with timely, reliable, practical information, recipes, blogs, questions and answers with Mayo Clinic experts and more. Our biweekly topic-specific e-newsletters also include blogs, questions and answers with Mayo Clinic experts, and other useful information that will help you manage your health.
Housecall Archives
Mayo Clinic Housecall
Stay up to date on the latest health information.
What you get
- Free weekly e-newsletter
- Mayo Clinic expertise
- Recipes, tools and other helpful information
- We do not share your e-mail address
Question
Body fat analyzers: How accurate are they?
How accurate are portable body fat analyzers?
Answer
from Edward R. Laskowski, M.D.
Although technology is improving, it's difficult to get an accurate body fat measurement from most commercially available body fat analyzers.
Various types of body fat analyzers — also called impedance meters — are available to the general public. Results from portable body fat analyzers can vary depending on many factors, however, including the quality of the device and how hydrated you are when the measurement is taken.
If you're concerned about your body fat percentage, skip the body fat analyzers and ask your doctor about more accurate measurement techniques. Depending on the circumstances, options may include:
- Dual energy X-ray absorptiometry (DXA). This is a specialized X-ray exam that provides detailed information about the ratio between fat, muscle and bones in specific parts of the body.
- Air displacement plethysmography. With this technique, you're enclosed in a computerized, egg-shaped chamber (Bod Pod, others). The device measures your weight and volume to determine your body density, then uses these figures to calculate your percentage of body fat.
- Underwater weighing. During underwater weighing, also known as hydrodensitometry, you're seated on a special chair and submerged under water. Your underwater weight or body density is then used to calculate your percentage of body fat.
Keep in mind that specific body fat measurement techniques can be expensive and may not be available in all locations. Underwater weighing, for example, may be available only in specialized research facilities.
Next questionHeart rate: What's normal?
- Jaffrin MY. Body composition determination by bioimpedance: An update. Current Opinion in Clinical Nutrition and Metabolic Care. 2009;12:482.
- Lintsi M, et al. Comparison of hand-to-hand bioimpedance and anthropometry equations versus dual-energy X-ray absorptiometry for the assessment of body fat percentage in 17-18-year-old conscripts. Clinical Physiology and Functional Imaging. 2004;24:85.
- Lohman M, et al. Reproducibility of dual-energy x-ray absorptiometry total and regional body composition measurements using different scanning positions and definitions of regions. Metabolism, Clinical and Experimental. 2009;58:1663.
- Lee SY, et al. Assessment methods in human body composition. Current Opinion in Clinical Nutrition and Metabolic Care. 2008;11:566.
- Bray GA. Determining body composition in adults. http://www.uptodate.com/home/index.html. Accessed Nov. 18, 2009.
- Jensky-Squires NE, et al. Validity and reliability of body composition analysers in children and adults. British Journal of Nutrition. 2008;100:859.
- Ball SD, et al. Comparison of the Bod Pod and dual energy x-ray absorptiometry in men. Physiological Measurement. 2004;25:671.
- Bentzur KM, et al. Evaluation of the BOD POD for estimating percent body fat in collegiate track and field female athletes: A comparison of four methods. Journal of Strength and Conditioning Research. 2008;22:1985.
Find Mayo Clinic on